.calculator {
    width: 300px;
    margin: 0 auto;
    padding: 20px;
    border: 1px solid #ccc;
    background-color: #f5f5f7;
    font-family: "MiLanPro", Arial, sans-serif;
}

#display {
    width: 100%;
    margin-bottom: 10px;
    padding: 10px;
    background-color: #fff;
    border: none;
    text-align: right;
    font-size: 28px;
}

.buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
}

button {
    width: 60px;
    height: 60px;
    margin: 5px;
    background-color: #f5f5f7;
    border: none;
    border-radius: 30px;
    font-size: 24px;
    color: #000;
}

.operator-button {
    background-color: #fd8d00;
    color: #fff;
}

.equal-button {
    background-color: #ff4040;
    color: #fff;
}